Hot water heater



Aug. 29, 1939.

N. MARCUS HOT WATER HEATER Filed Dec. 27, 1937 tll 5 ATTORNEY.

Patented Aug. 29, 1939 UNITED STATES PATENT OFFICE Application December27, 1937, Serial No. 181,814

1 Claim.

This invention relates to that type of hot water heaters, in which thewater to be heated is passed through successive layers of coils,terminating in two headers, and arranged in a casing or box throughwhich the heating medium circulates, and my invention has for its mainobject to provide a hot water heater of this character which will besimple in construction and more eificient in operation than are theheaters 7 now in use.

' Other objects of my invention will be apparent as the specification ofthe same proceeds, and among others, I may mention: to provide a heater,as characterized hereinbefore, which will be less expensive tomanufacture than the similar heaters now in use and still easier toassemble and disassemble, inspect and repair, and will have lessportions which need sealing against the escape of liquids or otherfluids.

Inthe drawing, forming a part of this specification and accompanying thesame:

Fig. 1 is a diagrammatic elevation of a boiler to which my hot waterheater is attached;

Fig. 2 is a vertical sectional elevation of my hot water heater,portions of the same having been broken away for the sake of showing theremaining parts on a larger scale;

Fig. 3 is a sectional elevation taken at a right angle to that of Fig. 2and on a smaller scale, While Fig. 4 is a horizontal sectional view ofthe device shown in Fig. 3.

Referring now to the drawing more in detail, bycharacters of reference,the numeral Ill indicates my hot water heater, in general, which, asshown in Fig. 1, is attached to an ordinary boiler II by an intake hotwater pipe line I2 and a return cooled water pipe line I3.

My hot water heater is arranged or housed in a casing or box [4 intowhich opens the hot water intake line I2, as at I5, and from which exitsthe cooled water outlet line I3, as at It. A removable cover I! isarranged on the front of the box or casing I4. Two reversibly placedheaders I8 and I9 are arranged adjacent to the side walls and 2|,respectively, the one, indi cated by I8, being for introducing the waterto be heated, and the other, indicated by I9, being for the exit of theheated water.

The header I8 has a pipe extension 22 adjacent to the bottom of thecasing I4 into which is sealingly secured the intake pipe 23 for thecold water to be heated. Extension 22 preferably is passed through thewall 20 in an opening 24 therein, and a resilient sealing washer 25 isplaced between the side wall 20 and an appropriate surface 26 on theheader I8, so that the header may be placed against said washer and thedevice secured in this position through the use of a nut 21 on theoutside, said nut possibly being provided with any of the usual lockingmeans, well known in this art.

The cold water entering through the pipe 23 will pass through a channelin the bottom of the header i8, as indicated at 28, and then into thelowermost layer of coils 29. A desired number of identical coils 29 isarranged in a superposed relation between the two headers I8 and I9, andtheir construction and arrangement is best shown in Fig. 4.

After the water to be heated passes the lowermost coil 29, it willarrive at the header l9, as

indicated at 30 in Figs. 2 and 4, and then will pass upwardly in achannel in header I9, as indicated at 3!, and as it is well known inthis art, leaving said header, as at 32, to enter the second layer ofcoils 29, passing through the same in a reverse direction and enteringheader I3, as at 33, then rising in header I8, as at 34, and passingfrom the same into the third layer of coils 29.

In this manner, the water to be heated will pass forwardly andbackwardly between the two headers I8 and I9 in the respective layers ofcoils 29, always rising in the respective header into the next higherlayer of such coils until finally it will arrive in header l8 to thetopmost layer of coils 29, and passing through the same will enter intothe exit channel in header I9,

which is in communication with an exit pipe extension 36 on said header,secured into the wall 2i of the casing in the same manner as has beendescribed hereinbefore in connection with the intake header pipeextension 22, a resilient washer being placed between the header and thewall 2|, the extension 36 projecting through the wall 2!, and beingsecured by the nut 21, as shown in Fig. 2. Into this pipe extension 36is secured in a sealed manner, the heated Water exit pipe 31.

The general construction of such headers is well known to the art, andit is believed that the description and the various drawings hereinoffered showing the same will be amply sufficient to make the operationof my hot water heater clearly understood by those versed in this art.

The bottom 38 of the casing l4 may be made forwardly and centrallyinclined towards the cooled water exit pipe I3, as indicated in Figs. 2and 3.

It will be seen that my invention provides an extremely simple andefilcient construction for such hot water heaters, in which the spaceWithin the casing is most efficiently utilized by a great number oflayers of coils placed in superposed planes, one above the other, andcommunicating between two headers within the casing, in the mannerdescribed, the whole construction being secured in the casing by theintake and exit pipe extensions 22 and 36, of the two headers only.

A clear, unobstructed, simple and unburdened cover plate ll (preferablysomewhat outwardly projecting, as shown) is provided for my heater,which cover may be removed and then the whole inside of the heaterinspected, the parts therein cleaned and repaired. My construction alsopro,- vides for an easy and quick removal of the headers and the coils,as will be understood. Indeed, after disconnecting the intake and outletextensions 22 and 36 from the cold and heated water lines 23 and 31, andremoving their respective nuts 27, the inherent resiliency of the coils29 will permit a compression of them in a horizontal plane to such adegree that the extensions 22 and 36 may be pushed or pulled inwardlyinto the casing l4, freed of the walls 26 and 2|, and the wholestructure of headers and coils entirely removed and cleaned andrepaired, and in a similar manner, it may be replaced easily andquickly. This is brought about by the fact that headers and coils, thewhole inside structure, of my heater, is free of the casing except wheresecured thereto at two places through the pipe extensions 22 and 36.

Through this construction, I also may take the cold water into my deviceand take the heated water out of the same without any other outsideconnections for my heater than the two pipe extensions 22 and 36, whichare easily and safely sealed, and therefore, no leaking connections arepossible with my device.

Each header, l8 and I9, is in the form of a vertical flat column, theirouter flat surfaces being placed adjacent to the respective flat sides20 and 2| of the housing or shell I4, near to the front edges of saidwalls, where they are closed by the removable cover l1, and the intakeheader l8 will rest with a flat bottom surface on the. bottom 38 of theshell, while the outgo header I9 will rest with a fiat top surfaceagainst the top of the shell [4.

It also will be obvious by inspecting the drawing, that my heater hasvery few and simple parts, and it is inexpensive to manufacture and easyand quick to assemble and disassemble.

Finally, it will be understood that my heater may be made, so to say,double acting, with very little change, that is, headers IB and I9 maybe made with two surfaces to receive two sets of coils 29, oppositelyplaced at the two sides of said headers, two systems of risingconnecting channels being provided in each header for the oppositelyplaced two sets of coils 29, in the same manner has been described forone of such systems, and one set of coils, hereinbefore. In this manner,with one cold water intake and one heated water exit, and no otheroutside connections, at hot water heater of very high capacity may beproduced.

What I claim is new is:

In a hot water heater, having a shell open in front, as well as intakeand outlet connections for a heating medium to pass therethrough, avertical inlet header and a vertical outlet header placed at therespective two side walls of said shell adjacent to said open endthereof, and a plurality of continuous, series connected serpentinecoils between said two headers within said shell, in combination, a flatlower surface on said inlet header arranged against a flat lower portionof the respective side wall, a flat upper surface on said outlet headerarranged against a flat upper portion of the respective other side wall,said inlet header also resting on the bottom of said shell, and the topof said outlet header also being placed against the top of said shell,said plurality of serpentine coils being arranged in super-posedhorizontal layers between said two headers in a horizontally yielding,resilient manner; an inlet extension pipe projecting from said lowerfiat surface in said inlet header and passing through the respectiveside wall, an outlet pipe extension projecting from said upper flatsurface in said outlet header and passing through the respective secondside wall, a continuous channel being formed from said inlet pipeextension through the coils and headers to said outlet pipe extension; aresilient washer placed around each pipe extension between therespective header and side wall, screw threads on the exposed outerportions of said pipe extensions, and a securing nut on each pipeextension adapted to be tightly drawn against the respective wall ofsaid shell, the fluid to be heated entering through said inlet pipeextension, and leaving through said outlet pipe extension.

NATHAN MARCUS.

